Driving mechanism for power driven vehicles



Dec. 29, 1931. Q K6HLER DRIVING MECHANISM FOR POWER DRIVEN VEHICLES Filed April 25, 1950 v Patented Dec.29, 1931 UNITED STATES PATENT oFFIcE OTTO-KbHLER, OF STUTTGART-UNTEBTUBKHEII, GERMANY, ASSIGNOB TO DAIMLER- IBENZ AKTIENGESELLSCHAFT, OI ST'UTTGABT-UNTERTUBKHEIH,,GERMANY, A 00115 PANY or GERMANY DRIVING an'cnamsm ron Application and April 23,1930, semi No.

7 I In power-driven vehicles having more than one driven rear axle, the difliculty arises of so choosing the distance between'the joints of the intermediate shaft that the angle of 5 deviation of the joints lies within the limits where no excessive wear occurs. Owing to the small distance between the driving axles,

it has hitherto not been possible, when bevel wheels are used, to reach the desired end of 10 diminishing the angle of deviation of the Cardan joint. It was therefore necessary to use a worm gear, with its unfavorable efliciency, in place of bevel gearing. The worm gear renders it possible to make the-connecting rods between the Cardan joints of such a length that the angle of deviation of the joints is not too great. I The problem of making'the intermediate shafts of such a length that the angle of deviation of the Cardan joint remains within the permissible limits, while using bevel gearing, is solved by the invention.- v The invention mainly consists in this that the bevel wheelfixed on the driving shaft engageswithtwo bevel wheels mounted on the shafts of. a pair of driving road wheels. Of these bevel wheels, one serves for driving the corresponding pair of driving roa wheels, while both engage with the bevel wheel serving to drive the rear pair of driv ing road wheels. I i The invention may be carried into efl'ect by connecting one of the said two bevel'whee'ls to the differential housing of the correspond ing pair of driving road wheels, and arrangingtheother bevel wheel, which drives the next pair of driving road wheels, freely on the driving road wheel-shaft. This method of arranging the said two bevel wheels renders it possible to place the bearing of one end of'the connecting shaft between the said two bevel wheels, and to arrange the differential gear atone side of the axis of the driving shafts. 7

Besides the above mentioned advantage of increasing the distance between the Gardan joints,the invention has also the advantage, that by duplicating the driving wheels on the more forward rearaxle, the wheels need be mediate wheel h, which is mounted on the rowan. DRIVEN vnmcms 440,701, and in Ger many April so, im.

dimensioned onl for taking up the forces necessary foreac axle.

In the accompanying drawing a construc- I tional example of the invention 1s illustrated diagrammatically.

On the driving shaft a is fixed a toothed wheel I) which engages with the toothed wheels 0 and d. :The intermediate wheel 0' is connected to the differential housing e, through which the road wheel axles f and g are driven. The intermediate wheel d is mounted freely on the axle f. The intermediate wheels 0 and d engage with the interpart iof the shaft. s 1

As the differential housing 0 is arran ed to one side of the middle of the driving sha s it is possible to place the bearings I: and lo the shaft 5 very close to the axles f and g. For instance, the bearing is arranged withln' the driving wheel h.

' In consequence, of this construction, the

Cardan'joints m and 71. may be set farther apart than would 'be possible if the differ ential housing were placed in line with the driving shafts. In this way'itis attained that the angle of deviation of the Cardan Joints remains within the permissible limits.

The part 0 of the shaft, joined to the Cardan joint m carries the intermediate wheel The latter engages with the toothed wheel g which is connected to the. differential housing 'r which drives the differential shafts sandt. What I'claim is: 7

1. In a ower driven vehicle having a plurality of riven axles, the combination with a haft and abevel driving wheel theredrivin s on an a pair of driving axle sections, of a driven bevel wheel in enga ement with said driving bevel wheel, a di erential housing connected to said driven bevel wheelon the side thereofremote from the axis of the driving shaft, an intermediate shaft coaxial with said driving shaft and having a bevel actuatin wheel thereon in engagement with said driven bevel wheel, a supporting bearing for said intermediate shaft interposed between 7 said bevel actuating wheel and the said driv ing axle sections, and driving means for actuating a succeeding driven axle, compr a connecting shaft, a second driving shaft for. a said axle and Cardan joints connected to said intermediate shaft and connecting shaft and 6 to said connecting shaft and second driving shaft, respectively. p

2. ,In a ower driven vehicle having a plurality of riven axles, the combination as set forth inclaim 1 with a second driven bevel wheel rotatable on one of the axle sections on the side of theaxis of the driving shaft re- .mote from the driven bevel wheel connected to the differential housing, said second driven wheel being in engagement with the bevel driving wheel and the bevel actuating wheel. 3. In a ower driven vehicle having a plurality of riven axles, the combination with a driving shaft-and a bevel drivingwheel thereon and a pair of driving axle sections, 7 of a driven bevel wheel in engagement with said driving bevel wheel, a differential housing connected to said driven bevel wheel on the side thereof remote from the-axis of the driving shaft, an intermediate shaft coaxial with said driving shaft and having a bevel actuating wheel thereon in engagement with said driven bevel wheel, a supporting bearing for said intermediate shaft interposed between said bevel actuating wheel and the said drivac ing axle sections, a second pair of axlesec tions, a connecting shaft, a, second driving shaft having a bevel driving wheel thereon, Cardan joints connected to said intermediate p and connecting shafts and to said. connecting a5 and second driving. shafts respectively, a driven bevel wheel in engagement with the bevel driving wheel on said second driving shaft, a difierential housing connected tosaid last named driven bevel wheel on the side thereof remote from the axis of the second driving shaft, and'a su porting bearing for said second driving shaft interposed between the bevel driving wheel thereon and the sec ond pair ofaxle'se'ctions. In testimony whereof I afix my signature.

o'rro KOHLER; 

